Redundant control apparatus

Details Redundant control apparatus Redundant control apparatus

2010-07-15

2011-11-22

Le, Dieu-Minh (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S011000

Reexamination Certificate

active

08065564

ABSTRACT:
First and second processing units execute the same control program to the same input data in parallel. An input/output unit generates the input data and receives one of two output data executed by the first and second processing units. A channel selection unit sends the input data to the first and second processing units and sends the one to the input/output unit by selecting the one from the two output data. In the first and second processing units, a control cycle synchronization unit generates a control cycle signal at a control cycle, a processor executes the control program, a data memory stores operation data including the input data, intermediate data being executed and output data executed by the processor. A diagnostics unit generates summary information by compressing the operation data and comparatively decides whether the summary information matches the other summary information of the other processing unit every control cycle.

REFERENCES:
patent: 6754846 (2004-06-01), Rasmussen et al.
patent: 6988221 (2006-01-01), Rasmussen et al.
patent: 2009/0044049 (2009-02-01), Luick

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